DOI: 10.1007/s00382-015-2509-1
Scopus记录号: 2-s2.0-84946476280
论文题名: Simulation of carbonaceous aerosols over the Third Pole and adjacent regions: distribution, transportation, deposition, and climatic effects
作者: Ji Z. ; Kang S. ; Cong Z. ; Zhang Q. ; Yao T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-09-10 起始页码: 2831
结束页码: 2846
语种: 英语
英文关键词: Black carbon
; Organic carbon
; Regional climate model
; Simulation
; Third Pole regions
英文摘要: Carbonaceous aerosols including black carbon and organic carbon over the Third Pole regions are simulated using a regional climate model (RegCM4.3) coupled with a chemistry–aerosol module. Results show that the model can simulate well the climatology of the Third Pole region in monsoon and non-monsoon seasons, but the model shows a cold bias and an overestimation of precipitation over the Himalayas and the northern Tibetan Plateau. The model also performs reasonably well in terms of aerosol optical depth and near surface aerosol concentration when compared with satellite datasets and in situ observations. BC wet deposition in monsoon seasons is more (less) than that in non-monsoon seasons in the southern (northwestern) parts of the Third Pole region. Westerly winds prevail throughout the year and transport carbonaceous particles from central Asia to the northern Tibetan Plateau. In the monsoon period, aerosols can cross the Himalayas and can be transported to high altitudes by the southwesterly winds over South Asia. Dry deposition shows a topography-controlled distribution, with low fluxes within and high fluxes outside of the Tibetan Plateau. Mixed carbonaceous aerosols produce positive shortwave radiative forcing in the atmosphere and negative forcing at the surface. Shortwave forcing is with less magnitude over the Third Pole region. Longwave radiation forcing is negative over the Pamir Plateau and positive over the Tibetan Plateau during monsoon season. In non-monsoon season, longwave radiative forcing is negative in the Himalayas and southern parts of the Tibetan Plateau. Aerosols increase surface air temperatures by 0.1–0.5 °C over the Tibetan Plateau and decrease temperatures in South Asia during the monsoon season. In the non-monsoon period, temperatures decrease by 0.1–0.5 °C over the southern Tibetan Plateau. Spatial changes in temperature are consistent with the distribution of longwave radiative forcing, which indicates that aerosols’ longwave radiative forcing probably plays an important role in the climatic impact of aerosols over the Third Pole region. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: NSFC, Chinese Academy of Sciences
; NSFC, Chinese Academy of Sciences
; NSFC, Chinese Academy of Sciences
; CAS, Chinese Academy of Sciences
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54136
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Building 3, Courtyard 16, Lincui Road, Chaoyang District, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, CAS, Beijing, China; State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environment and Engineering Research Institute, CAS, Lanzhou, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
Recommended Citation:
Ji Z.,Kang S.,Cong Z.,et al. Simulation of carbonaceous aerosols over the Third Pole and adjacent regions: distribution, transportation, deposition, and climatic effects[J]. Climate Dynamics,2015-01-01,45(2017-09-10)